>> ifill: now a reputed mobster's trial, replete with threats, profanity, and courtroom drama, winds down in boston. margaret warner has that. >> warner: both sides made their closing arguments today in the eight-week-long murder and racketeering trial of "whitey" bulger, the notorious chief of an irish mafia, the winter hill gang, active in south boston in the 1970s and '80s. bulger fled boston in 1994 after being tipped off he was about to be indicted, living underground until his arrest by the f.b.i. in california in 2011. jurors have heard testimony from more than 70 witnesses, related to 33 charges of murder, extortion, money laundering, and illegal weapons possession. columnist kevin cullen, who co- wrote the book "whitey bulger," has been following on the story for the "boston globe," and joins us now. kevin, welcome back to the program. >> thanks, margaret.